Wasn't sure where to post this, so if I got it wrong I apologize.

I've got to head to Michigan tomorrow and I'm thinking of checking out Mounds Off Road Vehicle Area in Genesee County (http://www.geneseecountyparks.org/pages/MoundsORV). The regulations say that vehicles must be equipped with a USFS approved spark arrestor. Is this something that I have to add to my stock muffler, or does the muffler qualify by itself?

I've been searching around online and haven't been able to find any clear information on what is required so any help would be greatly appreciated.

Also, they mention that helmets and eye protection are required...is that only for ATVs and open vehicles or will I still require a helmet for use with my truck?

Thanks!

 

I found this in
http://www.fs.fed.us/t-d/programs/fire/spark/faq.html


" Mufflers - Experience and tests have shown that mufflers, in general, are inadequate as spark arresters. Few muffler devices submitted for formal tests meet the requirements of 5100-lb or SAE J350. However, properly maintained baffled mufflers constructed to automotive industry standards, and installed on motor vehicles other than motorcycles are accepted for "on-highway" and "off-road" use in some jurisdictions. Exceptions are designated areas where a spark arrester is required on cross-country vehicles. Straight-through mufflers, such as glass-pack designs without baffles, are not acceptable. Consult your agency policy for more specific guidelines."


Looks like there is no national answer, only local answers. (this is consistent with other USFS documents I saw).

 

i have never heard of such a thing except on a bike